How to Prevent SharePoint Farm Password from Changing

Question

I have been trying to stop the SP farm account, spfarm, from password changing.  SharePoint Central Administration is used and I go to Central Security -> Configure managed accounts.  I set spfarm not to change but it makes no difference. 
It still changes.  When that happens it screws up the SharePoint VSS Writer service account and backups fail (the password synch script has to run to fix).  When the setting in SP CA is changed to allow password changes, the SharePoint VSS Writer
service account still has a problem and backups fail.
Additionally, I have run the two below scripts when necessary to try to correct the problem and it works until the password changes again.  It seems as though the password changes whenever the server restarts or at least once every week or so. 
Can anyone help me with this?  I don't care if the password changes on a schedule as long as it doesn't cause the SharePoint VSS Writer service to fail during backup.
Repair-SPManagedAccountDeployment (This checks synch of passwords)
set-spmanagedAccount -UseExistingPassword
This is on a Windows Small Business Server 2011, which runs SharePoint 2010.
Tony

Answer 1

Hi Tony,
In SBS 2011, use 3 different accounts to run Windows SharePoint Foundation. The accounts are spfarm (SharePoint
Farm Account), spsearch, and spwebapp. For security reasons the passwords on these accounts are periodically reset. The password for spfarm is reset every 7 days that the Windows SBS Manager service is running.
à
How to Prevent SharePoint Farm Password from Changing
I will suggest that set the password expiry to be longer (such as: a month or 365 days or even more) and apply
it. Maybe a workaround.
By the way, the Windows SBS Manager service manages the spfarm account. This spfarm account will be found under
MyBusiness-> Users-> SBS Users in ADUC. If you navigate to the spfarm account in ADUC and open the Properties of it, then select
“Password never expires” under Account options in Account tab. Please check if this can help you to achieve target.
Hope this helps.
Best regards,
Justin Gu